Failover WAN using a 3G USB modem/dongle and NIC possible?
Hey guys this is my first time posting a comment on the forums and I really hope that one of you might be able to help me sort out the following question.
I did some research and it became obvious that a failover WAN setup is possible i'm talking about the following setup:
ISP A and ISP B both get connected to the pfSense router with a dedicated NIC, when let's say ISP A has a blackout it should switch to using the connection provided by ISP B this would get rid of/minimalize down time for the LAN of the pfSense router…
Now i am wondering if i can reconstruct this same failover scenario Using only 1 NIC for ISP A and using a 3g/4g Dongle/modem for ISP B.
This should work the same way, if ISP A that uses the NIC goes down, it should be possible to switch to the USB 3g/4g dongle that uses ISP B.
Is this possible and if it is could someone point me in the right direction.
Thank you very much for your time.
I'm using this setup right now.
I set up a ppp connection, with /dev/cuaU0.0 as serial port. apn, phone number, username and password depending on your 3g provider.
I associated it with an interface.
I created gateway group and set up policy routing like any other dual wan configuration